id	domain	url
dem-5673	www.dem.umk.pl	http://www.dem.umk.pl/dem
dem-5673	dx.doi.org	http://dx.doi.org/10.12775/dem.2014.003
dem-5673	www.stat.gov.pl	www.stat.gov.pl
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.energy.2010.07.009
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/s0921-8009(98)00040-8
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.enpol.2007.03.032
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/s0140-9883(00)00050-5
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.enpol.2009.03.048
dem-5673	dx.doi.org	http://dx.doi.org/10.2307/2527284
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/s0921-8009(01)00280-4
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.ecolecon.2004.02.011
dem-5673	dx.doi.org	http://dx.doi.org/10.2307/2171846
dem-5673	dx.doi.org	http://dx.doi.org/10.1080/0003684042000233104
dem-5673	dx.doi.org	http://dx.doi.org/10.2307/1913236
dem-5673	dx.doi.org	http://dx.doi.org/10.2307/1392506
dem-5673	dx.doi.org	http://dx.doi.org/10.1198/073500101316970395
dem-5673	www.iea.org	http://www.iea.org/publications/freepublications/publication/poland2011_web.pdf
dem-5673	10.1016	http://10.1016/j.eneco.2012.03.001
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.ecolecon.2012.01.023
dem-5673	dx.doi.org	http://dx.doi.org/10.2307/2118443
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.enpol.2008.11.012
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/0304-4076(92)90104-y
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.energy.2008.07.006
dem-5673	dx.doi.org	http://dx.doi.org/10.2307/3213639
dem-5673	journal.r-project.org	http://journal.r-project.org/archive/2013-2/sax-steiner.pdf
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.ecolecon.2007.06.014
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.ecolecon.2006.07.009
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.worlddev.2004.03.004
dem-5673	dx.doi.org	http://dx.doi.org/10.1016/j.japwor.2008.09.001